This document provides information about Raven's Progressive Matrices, a nonverbal group test used to measure abstract reasoning and fluid intelligence. It consists of a series of visual patterns with one part missing, and requires the test-taker to determine the missing element of the pattern. The test gets progressively harder as it continues. It was originally developed by John C. Raven in 1936 and is currently published by Pearson PLC. There are three versions for different ability levels: Standard, Colored, and Advanced.